B. Text of Launch Announcements.

2006-020B

Thaicom 5
is a Thai geostationary communications satellite that
was launched by an Ariane 5 ECA rocket from Kourou at 21:09 UT on
27 May 2006. The 2.8 tonne (with fuel) triaxially-stabilized craft
will provide television and internet services to the Asia-Pacific
region through its 25 C-band and 14 Ku-band transponders after
parking over 78.5° E longitude. It will replace the aging
Thaicom 1 and Thaicom 2 satellites that were launched in 1993 and
1994.

2006-020A

SatMex 6
is a Mexican geostationary communications satellite that
was launched by an Ariane 5 ECA rocket from Kourou at 21:09 UT on
27 May 2006. The 5.7 tonne (with fuel) craft will provide voice,
data, and video services to Mexico, South America and the continental
United States, through its 36 C-band and 24 Ku-band transponders
after parking over 109.2° W longitude.

2006-019A

COMPASS 2
(Complex Orbital Magneto-Plasma Autonomous Small
Satellite 2) is a Russian (IZMIRAN) ionospheric microsatellite that
was launched by a Shtil 1 rocket (a modified submarine-based
ICBM) from a nuclear submarine in Barents Sea at 18:50 UT on
26 May 2006. It is also known as KOMPAS 2. The
80 kg satellite carries detectors for electromagnetic signatures
created by/before earthquakes and volcanoes. The initial orbital
parameters were period 93.9 min, apogee 525 km, perigee 402 km, and
inclination 78.9°.

2006-018A

GOES 13
is an American (NOAA) geostationary weather satellite
that was launched by a Delta 4 rocket from Cape Canaveral at 22:11 UT
on 24 May 2006. The 3.2 tonne (with fuel), 2.3 kW craft carries the
usual set of GOES monitors: imager, sounder, SEM package, X-ray
imager, energetic particle detector, and ground-data relaying
equipment. The parking longitude is yet to be finalized. More
details are available at http://www.oso.noaa.gov/goes/.

Imager: This is a multi-channel instrument covering 0.52-13.7 micron
band in five discrete channels. It carries a two-axis scanning mirror
to scan east-west and north-south, covering the entire hemisphere
below it. Clouds are imaged in four channels, water vapor in one
channel, and surface temperature in one (or three) channels, fires
and smoke in two (or four) channels.

Sounder: The so-called Sounder carries a 19-channel, discrete-filter,
passive radiometer covering the wavelength range of 0.7-14.71 microns.
It looks toward the horizon to monitor the radiation. The data can
then be processed to provide vertical profiles of temperature, water
vapor, and clouds.

SEM: The Space Environment Monitor is a standard package in all GOES
missions. It carries an energetic particle sensor (EPS) to obtain the
local fluxes of electrons, protons and alpha-particles. Its XRS
monitors X-ray flux from the Sun in two wavelength bands: 0.05-0.3 nm
and 0.1-0.8 nm. A magnetometer monitors the field vector
of the disturbed by geomagnetic activity. A five-channel EUV
telescope monitors the solar ultraviolet radiation in the 10-126 nm.

X-Ray Imager: The imager maps the X-ray emitting regions on the Sun
in the bands 0.6-3.0 and 0.6-6.0 nm, once a minute. The resolution
is about 3 arc-min, covering the field of view of 42 arc-min.

2006-017A

Cosmos 2420
is a Russia military satellite that was launched by
a Soyuz-U rocket from Plesetsk at 17:38 UT on 03 May 2006. The
initial orbital parameters were period 89.8 min, apogee 337 km,
perigee 189 km, and inclination 67.2°.

C. Spacecraft Particularly Suited for International Participation

Spacecraft with essentially continuous radio beacons on frequencies
less than 150 MHz, or higher frequencies if especially suited for ionospheric
or geodetic studies.

NNSS denotes U.S. Navy Navigational Satellite System. Updates or
corrections to the list are possible only with information from the
user community.

Note:
The full list appeared in SPX 545.
The list will not be repeated in future issues until significantly revised
again.

High precision (<20 cm) GPS constellation tracking data obtained from
the network of about 400 dedicated global stations that are of interest to
geodetic study may be obtained through the following services provided
by the International GNSS Service (IGS). The IGS is a service of the
International Association of Geodesy (IAG).

All GLONASS spacecraft are in the general Cosmos series. The Cosmos numbers
invoked by USSPACECOM have often differed from the numbers (NNNN)
associated in Russia; when different, the USSPACECOM Cosmos numbers are shown
in parentheses. The corresponding GLONASS numbers are Russian numbers, followed
by the numbers in parentheses that are sometimes attributed to them outside
Russia.

60-day Decay Predictions.

Miscellaneous Items.

This section contains information or data that are entered on occasion
and may not be repeated in each issue of the SPACEWARN Bulletin.

Related NSSDC resources.

NSSDC/WDC for Satellite Information is an archival center for science
data from many spacecraft. Many space physics datasets are on-line for
electronic access through:http://nssdc.gsfc.nasa.gov/space/

For off-line data, please contact the Request Office, NSSDC, Code 690.1,
NASA GSFC, Greenbelt, Maryland 20771, U.S.A., for specific information
(nssdc-request@listserv.gsfc.nasa.gov).
Information on the current status of the instruments on board from the
investigators will be most welcomed. Precomputed trajectory files
and orbital parameters of many magnetospheric and heliospheric science-payload
spacecraft may be obtained from:http://nssdcftp.gsfc.nasa.gov/miscellaneous/orbits/